The difference between metaphor and duality

Metaphor and parallelism are two common expressions in rhetorical devices, and they have some differences.

First of all, a metaphor is used to compare one thing with another thing in order to better understand, describe or explain. Metaphor uses metaphor to convey a meaning by applying characteristics or attributes of one thing to another. For example, the "sun" in "He is a sun, lighting up our lives" is a metaphor for "him" and is used to describe the warmth and light he brings to others.

Duality refers to the use of relative, similar, and complementary structures or semantics in expression to enhance the effect of expression, make the text more balanced, cadenced, and produce a sense of rhythm and beauty. Parallels often take the form of repeated occurrences of the same or opposite words, phrases, sentence structures, etc. For example, the words "spring water is full and the autumn moon is bright" in "spring water is full and the autumn moon is bright" are dual expressions, forming an effect of contrast and balance.

In general, metaphor focuses on conveying a metaphorical meaning and enhances the image and appeal of expression through analogy; antithesis focuses on making expression more rhythmic through repetition, symmetry or contrast. Strong sense and balanced structure. This is the main difference between the two.